KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > fop > datatypes > PercentLength


1 /*
2  * $Id: PercentLength.java,v 1.4.2.1 2003/02/25 10:48:28 jeremias Exp $
3  * ============================================================================
4  * The Apache Software License, Version 1.1
5  * ============================================================================
6  *
7  * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without modifica-
10  * tion, are permitted provided that the following conditions are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright notice,
13  * this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright notice,
16  * this list of conditions and the following disclaimer in the documentation
17  * and/or other materials provided with the distribution.
18  *
19  * 3. The end-user documentation included with the redistribution, if any, must
20  * include the following acknowledgment: "This product includes software
21  * developed by the Apache Software Foundation (http://www.apache.org/)."
22  * Alternately, this acknowledgment may appear in the software itself, if
23  * and wherever such third-party acknowledgments normally appear.
24  *
25  * 4. The names "FOP" and "Apache Software Foundation" must not be used to
26  * endorse or promote products derived from this software without prior
27  * written permission. For written permission, please contact
28  * apache@apache.org.
29  *
30  * 5. Products derived from this software may not be called "Apache", nor may
31  * "Apache" appear in their name, without prior written permission of the
32  * Apache Software Foundation.
33  *
34  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
35  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
36  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
37  * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
38  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
39  * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
40  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
41  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
42  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
43  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44  * ============================================================================
45  *
46  * This software consists of voluntary contributions made by many individuals
47  * on behalf of the Apache Software Foundation and was originally created by
48  * James Tauber <jtauber@jtauber.com>. For more information on the Apache
49  * Software Foundation, please see <http://www.apache.org/>.
50  */
51 package org.apache.fop.datatypes;
52
53 import org.apache.fop.fo.expr.Numeric;
54
55 /**
56  * a percent specified length quantity in XSL
57  */
58 public class PercentLength extends Length {
59
60     private double factor;
61     private PercentBase lbase = null;
62
63     /**
64      * construct an object based on a factor (the percent, as a
65      * a factor) and an object which has a method to return the
66      * Length which provides the "base" for this calculation.
67      */
68     public PercentLength(double factor) {
69         this(factor, null);
70     }
71
72     public PercentLength(double factor, PercentBase lbase) {
73         this.factor = factor;
74         this.lbase = lbase;
75     }
76
77     public void setBaseLength(PercentBase lbase) {
78         this.lbase = lbase;
79     }
80
81     public PercentBase getBaseLength() {
82         return this.lbase;
83     }
84
85     /**
86      * Return the computed value in millipoints. This assumes that the
87      * base length has been resolved to an absolute length value.
88      */
89     protected void computeValue() {
90         setComputedValue((int)(factor * (double)lbase.getBaseLength()));
91     }
92
93     public double value() {
94         return factor;
95     }
96
97     public String JavaDoc toString() {
98         // return the factor as a percent
99 // What about the base value?
100 return (new Double JavaDoc(factor * 100.0).toString()) + "%";
101     }
102
103     public Numeric asNumeric() {
104         return new Numeric(this);
105     }
106
107 }
108
Popular Tags